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Identify the no. of correct statements?
1) Reducing property of dioxide decreases from $S O_{2}$ to $T e O_{2}$ .
2) $O_{2}$ is unique in being paramagnetic inspite of having even number of electrons
3) oxygen is used in oxyacetylene welding
4) The combustion of fuels, e.g., hydrazines in liquid oxygen, provides tremendous thrust in rockets.
5) Examples of neutral oxides are CO, NO and $N_{2} O$

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answer is 5.

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Detailed Solution

(1) Reducing property of dioxide decreases from SO₂ to TeO₂ ; SO₂ is reducing while TeO₂ is an oxidising agent.

(2) O₂ is paramagnetic according to Molecular orbital theory.

(3) oxygen is used in oxyacetylene welding, in the manufacture of many metals, particularly steel

(4) The combustion of fuels, e.g. hydrazine in liquid oxygen, provides tremendous thrust in rockets.

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